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Effect of Rheocasting on Corrosion of AM50 Mg Alloy
Chalmers University of Technology.
Chalmers University of Technology.
Chalmers University of Technology.
University of Technology.
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2015 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 162, no 3, C85-C95 p.Article in journal (Refereed) Published
Abstract [en]

The corrosion behavior of magnesium-aluminum (Mg-Al) alloy AM50 produced by a rheocasting (RC) technique was examined in the presence and absence of CO2 at three temperatures -4, 4 and 22 degrees C. The slurry preparation in the RC material was performed with the newly developed RheoMetal process. For reference, 99.97% Mg was included in the corrosion exposures. The influence of the microstructure on the atmospheric corrosion of alloy AM50 produced by RC and high pressure die casting (HPDC) was investigated. The RC AM50 alloy showed better corrosion resistance than HPDC AM50 in all the exposure environments studied. For both materials, there was a strong positive correlation between temperature and the atmospheric corrosion rate. The superior atmospheric corrosion behavior of RC AM50 compared to HPDC AM50 is carefully discussed in relation to differences in the as-cast microstructure. This study demonstrates that producing the alloy AM50 by this type of RC technique opens the door to Mg-Al alloys as a promising candidate for various applications where corrosion resistance is of importance.

Place, publisher, year, edition, pages
2015. Vol. 162, no 3, C85-C95 p.
Keyword [en]
Aluminum, Aluminum alloys, Atmospheric corrosion, Carbon dioxide, Corrosion, Corrosion resistance, Corrosive effects, Die casting, High pressure effects, Magnesium castings, Microstructure, Rheocasting As cast microstructure, Atmospheric corrosion behavior, Corrosion behavior, Exposure environment, High pressure die casting, Mg-Al alloys, Positive correlations, Three temperature
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-28886DOI: 10.1149/2.0331503jesISI: 000349823700042Scopus ID: 2-s2.0-84923353816OAI: oai:DiVA.org:hj-28886DiVA: diva2:891441
Available from: 2016-01-07 Created: 2016-01-07 Last updated: 2016-02-09Bibliographically approved

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Wessén, MagnusJarfors, Anders E.W.
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CiteExportLink to record
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Citation style
  • apa
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